# Sirius Navigator vs Altimeter GPS Barometer

The clearest difference is in-app purchases: Sirius Navigator at none against Altimeter GPS Barometer's 3. Sirius Navigator also leads on ads (none vs shown) and iOS requirement (11.1 vs 16.0). Altimeter GPS Barometer's advantage is update cadence (every 3 days vs every 6 months). On price and device support there is nothing between them.

Both are free to download. Altimeter GPS Barometer sells 3 one-off in-app purchases. Sirius Navigator asks for nothing beyond the download.

Sirius Navigator ships an update every 6 months, Altimeter GPS Barometer every 3 days. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Sirius Navigator | Altimeter GPS Barometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (9 ratings)](https://appshunter.io/ios/app/sirius-navigator/id1278713154/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 3 days** |
| Monetization | Free | — |
| Size | 60 MB | 41 MB |
| Requires iOS | **11.1** | 16.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Baev](https://appshunter.io/developer/1274062833) | [静华 黄](https://appshunter.io/developer/1501801862) |

## What reviewers say

### Sirius Navigator

[App page](https://appshunter.io/ios/app/sirius-navigator/id1278713154)

This app provides navigational tools including a compass, barometer, and altitude readings. It also offers easy access to your phone's light control for added convenience.

**Highlights:** Magnetic and True North compass, Location data, Altitude measurement, Barometer readings, Phone light control

**Features:** macOS Compatibility

**In-app purchases:** none


### Altimeter GPS Barometer

[App page](https://appshunter.io/ios/app/altimeter-gps-barometer/id6475106813)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |
| Forever Unlock Compass(Magic) | $0.99 | one-time |
| Forever Unlock Compass(Simple) | $1.99 | one-time |


## Frequently asked questions

### Is Sirius Navigator free?

Sirius Navigator is free to download, with no in-app purchases.

### Is Altimeter GPS Barometer free?

Altimeter GPS Barometer is free to download, with in-app purchases available.

### Do Sirius Navigator or Altimeter GPS Barometer have ads?

Altimeter GPS Barometer shows ads; Sirius Navigator does not.

### Which is updated more often, Sirius Navigator or Altimeter GPS Barometer?

Sirius Navigator ships an update every 6 months, and Altimeter GPS Barometer every 3 days. Most recently, Sirius Navigator was updated on November 6, 2026 and Altimeter GPS Barometer on November 4, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*